文档介绍：-= += 240÷48= 4200÷300=
-= 396+99= 90×30= 20×35=
1-= 3-= += 286+199=
-= 36×99= ÷2= 48÷=
96÷3= ÷= ÷6= ÷=
÷= ÷= ÷= ÷24=
÷= ÷= ÷2= 48÷=
96÷3= ÷= ÷6= ÷=
÷= ÷= ÷= ÷6=
÷3= ÷= ÷= ÷7=
32÷42= ÷13= ÷= ÷=
+= --= 30×= 15÷=
-= ×= ×= 8+2-8+2=
286+198= 314-202= 526+301= 223-99=
×= ×= ×= ×=
10×= ×= ×7= ×=
×= ×4= ×= ×=
×= += 100-= ×4=
×= ×5= ×4= ×=
-= ×1= 0×= ×8=
8÷10 = 10--= += ×4×12=
×= -3x= a+3a+7a= ×100=
1÷= ÷3= ÷= ÷6=
×10= ×100= ×100= 4÷=
×100= ×10= ×100= × =
× = 3×= ×= ×=
×8= 50×= 80× = ×9=
×5= + = ÷ = ×=
÷= ×= 12-= ÷=
+= ÷= +×= -=
27+456+73= ×= += ÷=
12÷= ÷= 13÷4= ÷=
×= 7÷= ××= 8-=
16÷= ×= += ÷16=
÷= ÷= ÷= +=
×3= ÷= +×3= ÷2=
÷= ×4= ×= ×=
×= ×= ×= ÷=
×= ÷= ×100= ÷=
+= ×= ×= ×5=
×4= ÷4= ×4= ÷=
÷= ×13= ×15= ×14=
×36= ×= ×= ×3=
×22= ÷= ×= ÷=
÷= ×= ×= ×=
×= ×= ×= ×5=
×= ×= ×= ×=
×= ×25= ×= ÷=
÷= ÷= ×= ×=
×= ×= ×= ×=
×= ×= ÷29= ÷=
÷= 8÷10= 10--= +=
×4×12=